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HDC carb
Jan 28, 2015 11:02:47 GMT -5
via mobile
Post by jerrycmorrow on Jan 28, 2015 11:02:47 GMT -5
Assembled a frankinsaw from couple of EZAs. Replaced seals, cleaned up oiler, and rebuilt two different HDC carbs after USC baths. Got it to run once but wouldn't tune so installed seals. Now won't start, floods. I've double checked diaphragm/gasket order and needle setting. Several times in fact. Got good compression and spark. Gonna try a new plug. Got to scratching around on the other of the two; removed small screen that walbro recommends against removing and discovered the screen was totally gunked up with setup gas (even after carb cleaner and USC baths). Gonna pull carb AGAIN and triple check everything, make new carb/manifold gaskets, try new plug. What am I missing?
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Post by sawnami on Jan 28, 2015 14:22:21 GMT -5
Any chance that the flywheel has slipped?
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Post by dancbx on Jan 28, 2015 22:21:21 GMT -5
Assembled a frankinsaw from couple of EZAs. Replaced seals, cleaned up oiler, and rebuilt two different HDC carbs after USC baths. Got it to run once but wouldn't tune so installed seals. Now won't start, floods. I've double checked diaphragm/gasket order and needle setting. Several times in fact. Got good compression and spark. Gonna try a new plug. Got to scratching around on the other of the two; removed small screen that walbro recommends against removing and discovered the screen was totally gunked up with setup gas (even after carb cleaner and USC baths). Gonna pull carb AGAIN and triple check everything, make new carb/manifold gaskets, try new plug. What am I missing? Is the diaphram and gasket in proper order? hi/lo mix screws get crossed? |
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Post by jerrycmorrow on Jan 29, 2015 8:12:06 GMT -5
flywheel is squared up. diaphragm/gasket installed correctly. hi/lo screws are the same in every respect.
I did notice last night that the diaphragm lever on the circuit plate has some weird angles looking in profile. anyone got any profile pix of a good one. thinking that's keeping the needle from seating even though the top of the lever is set even with the carb body.
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Post by sawnami on Jan 29, 2015 8:21:36 GMT -5
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Post by jerrycmorrow on Jan 29, 2015 8:42:49 GMT -5
thanks Steve but I have that publ and that line drawing really doesn't do it. I need to see a good one in profile. I'm assuming that adjusting the lever should leave the two halves in distinct flat planes rather than curved. am I right?
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Post by jerrycmorrow on Feb 19, 2015 10:54:09 GMT -5
final episode on the hdc carb issue.
took circuit plate from another carb and installed it. still no joy.
started over.
gas - check
air - check
spark - removed plug, turned lights out, pulled engine over and got sporadic spark. then one time I noticed the spark came from the middle of the coil/plug wire. wth? pulled it several more times with same result. replaced coil wire and started immediately. dam! used it to cut some wood couple weeks ago. whodda thunk? rive and rearn eh?
I had a bad case of tunnel vision.
hope this helps some of yas with similar symptons. most always the easy things that bite.
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